Results 141 to 150 of about 28,372 (298)
Stereochemical Control in the Matteson Reaction
Chemistry – A European Journal, Volume 32, Issue 40, 27 October 2026.The Matteson homologation is a highly versatile method for the stereoselective insertion of carbenoids into boronic esters. Through iterative application of the process, complex chiral molecules can be synthesized. The stereoselectivity of the reaction is determined by a chiral diol incorporated in the boronic ester.
Hae Mo Lee, Christoph Hirschhäuser
wiley +1 more source
Angewandte Chemie, Volume 138, Issue 43, 19 October 2026.A metal‐free photocatalytic platform converts nitrones into 4‐isoxazolines and oxa–aza–bicycloheptanes through divergent [3+2π/σ] cycloadditions. Assembly‐controlled kinetic electron transfer gating dictates substrate activation, enabling selective reactivity beyond thermodynamic expectations.
Nayan Saha +6 more
wiley +2 more sources
Intramolecular annulations of donor–acceptor cyclopropanes
, 2010 The intramolecular reaction of donor–acceptor cyclopropanes with various dipoles and dipolar equivalents allows access to a variety of bicyclic adducts with good stereocontrol. The linkers can often be cleaved to provide stereodefined products.
Terry P. Lebold, Michael A. Kerr
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Enantioselective Synthesis of 1,2,3-Trisubstituted Cyclopropanes Using gem-Dizinc Reagents
, 2016 Enantioselective Synthesis of 1,2,3-Trisubstituted Cyclopropanes Using gem-Dizinc ...
André B. Charette (1446916) +1 more
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Under Rh-catalyzed conditions, secondary amines and anilines function as directing groups to facilitate regioselective C–C bond activation of nonactivated cyclopropanes.
David Dailler (4776126) +2 more
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Chemistry – A European Journal, Volume 32, Issue 39, 22 October 2026.Cyclopropylamines have emerged as powerful photocatalytic building blocks. Upon light‐induced single‐electron oxidation, they undergo strain‐release ring opening to generate distonic iminium radicals that enable diverse transformations, including ring‐opening functionalization, formal [3 + 2] cycloadditions, radical cascades, and asymmetric bond ...
Maria Chiara Cabua +3 more
wiley +1 more source
Réarrangements sigmatropiques - Synthèse de cyclopropanes fonctionnalisés
, 2016 The cyclopropane ring is ubiquitous in natural and biologically active compounds. [3,3]-Sigmatropic rearrangements of cyclopropenylcarbinol derivatives have been developed to access functionalized alkylidenecyclopropanes, which are useful precursors of ...
Ernouf, Guillaume
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The Mechanism of Visible‐Light Photochemical Rearrangements of Conjugated Amide Enolates
Chemistry – A European Journal, Volume 32, Issue 39, 22 October 2026.Visible light irradiation of extended enolates of N‐benzylamides leads to homolytic C─N Bond cleavage, generating a biradical. Computational and mechanistic studies suggest rapid radical recombination within a solvent cage to give either ring‐expanded or rearranged products. ABSTRACT Deprotonation of conjugated amides forms colored solutions of lithium
James Mortimer +3 more
wiley +1 more source
Comparative chemistry of protected phosphines within the synthesis of cyclopropanes
, 2004 On treatment with base, diphenylphosphinoyl esters 3 (X=O) give cyclopropanes 4 via a series of steps including intramolecular acyl and phosphinoyl transfer processes.
Clarke, C
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